I do believe most of it. At least in the current dev environment we are "trained...

I do believe most of it. At least in the current dev environment we are "trained" to give long estimates that are often too long or too short

I have had the experience of giving a long estimate and having a junior doing it in a third of the time

Because we prioritize the "correct" way, or forget some harmless shortcuts, or we just take advantage of it to avoid pressure and burnout

When failing to realize the steaks, or not been properly explained